While I love the look of those rocker guards, it looks like the amount of extension out from the side of the body would really put a ton of stress on the lower edge of the body if those are not tied into the frame.
When you say there's an underhag to meet the sheetmetal underneath, is it bolted on under there too? That would help some I supoose.
I'm picturing one of them hanging up on a rock with neither wheel on the ground so they'd end up with the entire weight of that side of the vehicle hanging off of it. The only body-only attachment rocker guards that I've seen seen have been positioned right along the lower edge of the body, like the tube kind that basically run right along the lower edge of the sheet metal.
Now if they're tied into the frame, more like nerf bars, there's a ton more strength and you can cantilever them out much better.
I'm not trying to be overly critical, I'd just hate to see some severe body damage result from a badly placed rock hit without saying something.
Please correct me if I'm making bad assumptions from the picture.
I really like your front and rear bumpers though, how much for a set of those?